Question: Who was the spouse of Roger Vadim on 1990-12-21?
Paraphrase: On 1990-12-21, who was Roger Vadim's wife?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q383420 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1990')) }